<template>
	<ul>
		<li :style="{opacity}">欢迎学习Vue</li>
		<li>news001<input type="text"></li>
		<li>news002<input type="text"></li>
		<li>news003<input type="text"></li>
	</ul>
</template>

<script>
	export default {
		name:'News',
		data() {
			return {
				opacity: 1
			}
		},
		beforeDestroy() {
			console.log('News组件即将被销毁了')
			//clearInterval(this.timer)
		},
		mounted() {
			// this.timer = setInterval(() => {
			// 	console.log('@')
			// 	this.opacity -= 0.01
			// 	if(this.opacity <= 0) this.opacity = 1
			// },16)
		},
		//路由组件独有的生命周期狗子
		activated() {
			console.log('News组件被激活了')
			this.timer = setInterval(() => {
				console.log('@')
				this.opacity -= 0.01
				if(this.opacity <= 0) this.opacity = 1
			},16)
		},
		deactivated() {
			console.log('News组件失活了')
			clearInterval(this.timer)
		},
	}
</script>